#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Mon Jul  1 00:45:06 2024

@author: liqingsimac
"""
import matplotlib.pyplot as plt
import numpy as np

fig, ax = plt.subplots()
circle = plt.Circle((0.5, 0.5), 0.3, color='r', alpha=0.5)
ax.add_patch(circle)

plt.show()
